Micrometer-gage.



PATIENTED JULY 31, 1906. J. 0. B. LEACH & w. 0. WOODMAN.

MIGROMETER GAGE. APPLIOATIONTILBD MAY 27.1905.

2 $HEETS+SHEET 1.

TOOL

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J-. G, B. LEAGH & W. O. WOODMAN.

MICRO METER GAGE. APPLIOATION FILED MAY 27. 1905.

PATENTED JULY 31, 1906.

2 SBEBTSSHEET 2.

James C.E.Leac 1. I WilliamflTWoodm-an, anwutm YLZi/Wl 62% 94 m IQ aZl whom it may concern:

' Be it known that we, JAMES and WILLIAM O. WOODMAN, citizens of the United States, residing at Norwich, in the county of New London and State of Con-' necticut, have invented a new and usefulzImi provement in Micrometer-Gages, the'joll'owing is a specification- This invention is in micrometer-gages for machinists use; andjour immediate purpose is to pro'vide a convenientformof gage spe- 5 :cially adapted for usewith planing and millingmachines of the class in which the worksu porting table is arranged to reciprocate re 'atively to the cutting tool or mill.

JAMES LEAOH AND STATES.

WILLIAM o. WOODMAN, or CONNECTICUT.

NORWICH.

MICRQMETER-GAGE. l l l of which i In. the accompanying drawings We have illustrated our improved micrometer-gage, Figure 1 being a transverse sectional view of 1thebed. of. a. planer and its supporting-ways and. aportion of a planer-tool. In this view the block .to be planed is shown upon the bed and a. gage of ,our newly-improved form is suspended in said bed. Fig. 2 is a relatively enlarged view of a gage embodyingour pres-j 'ent im rovements. Fig. 3 is a longitudinal centra sectional view of said gage. Fig. 4 is azviewcf said gage from the upper or flanged end of. the same. a Fig. 5. is a transverse sectional. view taken on: line 5 5, of Fig. 2. Fig. his, a. side elevation of section a detached. Figs. 7 and 8 are respectively side and end views of the binding-collar d, and Fig.-9.is a

- cross-sectional View of saidv collar on line 9. 9

.ofl'Figs. 3 and 7.. Fig. 1.0 is a detached view of the externally-threaded. section 6.. Fig.

.1 1 is adetachedview of the barrel-section'c, and Figs. 12 andj13 are respectively side and endviews ofthe collar g, that is adjustably I mounted upon said.barrel-section..

Our invention consists in the main of means for suspending a micrometer-gage from;the upper faceof the bed of a planer or miller, utilizing the holes or slots in said bed.

Incidentally We have improved certain other details of construction, as we will explain later on. i 3 I Referring to the drawings hereto annexed,

, the letters a 1) indicate the two body-sections of'our said gage, section a being threaded internally to receive the externally-threaded portion 1) of section b. The perimeter of section a is suitably graduated longitudinally, as at a, to coact with circumferential graduations b on the barrel portion 0 of sec- Specification of Letters Patent; Appliaationfiled May 27,1906. Serial No- 262} 61&.

' 5 tion I), that surrounds the screw 1)", the con.- O. E. LEAon;

struction thus far described being substantially the same as that of micrometer-gages as now commonly constructed.

. Patented. Ju 3131 -906 The screw 1) and surrounding barrel pol tion 0 are, in effect, a single solid structure; but for convenience and economy of con- 1 struction we make them as separate parts and then secure themfrigidly together, as-we will now ex lain. The'f'inner end portion of the screw I)" is shouldered down and' threaded, as at 12 and the end wall of" the barrel-section 0 is bored through to receive the said shouldered-down portion. I (See Fig. 31).

I When the partsare thus assembled, a cupped nut h is screwed upon the threaded endof the extension 6 thus clamping the screw 12" and barrel 0 rigidly together. The screw 6'" is also formed with a threaded extension 11,",

upon which we screw, first, a check nut iland then a cupped nut 76, having an extension '16; By properly adjusting the nut 16 u ,on the ex tension h the length overpall of t "e screw 5, barrel 0, and nuts h 7c maybe varied to come pensate for wear, and when thus adjusted the nut 76 may be. securely, fixed to the nut extension h by means of'the check-nut '5. I

The outer end' of the body-section a; is 4 formed With an enlarged head. a}, that is cupped, as ata this head serving asa sus pension-support when it is-desired to use the gage with the bed .of" a. 'l'aner or other ma;- chine. See Fig. 1.). 'e micrometer-scale is so designed that whenaitiregisters zero tihe free or upper end 12 of the screw 12'" is in-ex actly thesame plane as the underside'ofthe head a and it will therefore he understoodthat" when the micrometer'stands at. zero and the gage is suspendedin the planer-bed the w free end I)" ofthe screw will be in exactly-the 7 samegplane as the top of safidlplaner-bedl Should it be desired to plane a piece vvof'lworli to one-half an inch thick, for example'it is only necessary to adjust the gageuntil itr'ege istersfive-hundred one-thousandths of 'a'n V inch, when the said free end of'screw 5 will project exactly one-half inch above the planer-bed. The planer-tool may then be adjusted'until it rests upon the free end I) of the screw, and if it (the tool) be then fed across the piece of work the latter will ob- -viously be planed to exactly one-half an inch in thickness.

Should it be desired-to use our described gage for taking measurements greater than the limited adjustment provided by screw 1), the said gage may be inverted bodily and placed upon the broad head a when by suitably ad usting the micrometer any desired measurement within the limit of the screw may be readily obtained. Should it be de-- siredto provide for still longer measurements, extension-collars may be usedas, for example, one inch in height. Such extensions,

however, form no part of our present inven-.

tion.

It will be noted by referring to Figs. 2,4, and 6 of the annexed drawings that a segment of the head a is cut awa as at a. This is done for a particular an important purpose-to wit, in order that a broad-nosed planer-tool may reach the end of the screw when said end is below the outer face of said head. Otherwise the tool would engage the flange of the head before it could be dropped down to the level of the end of the screw. By cutting awayla segment of the circumferential wall of t e head the tool may enter from the cut-away side, and thus reach the screw end or gage without hindrance.

In order to clamp the sections a I) together after they have been properly adjusted, we have provided sim lebut effective means, consisting of a binfing or clamping collar (1, loosely mounted upon the internally-thread- 'ed body-section a, and a plug e, that is loosely mounted in a radial opening in said section (1 immediately under the collar (1. The said collar is formed with an interior eccentric cam-groove d of a width sufiicient to receive the outer end of the plug e. When the collar is suitably adjusted, the plug lies largely in said cam-groove and has no binding efiect upon the screw-section b; but when the collar (1 is partially rotated the camgroove 01 forces the plug inward into close engagement with the screw-section, and thus binds the two sections a b frictionally together with sufficient force to prevent the accidental displacement of said parts with respect to each other. A partial turn of the collar will, however, immediately release the said parts.

By preference we mount the graduated scale 5 upon a collar 9, that is fitted tightly, but not immovably, upon the barrel-section c. jlShould the end of the gage-screw b becoi'iie worn, the defect may be quickly corrected by partially rotating the collar 9, so as i to set the scale at zero, after having tested and adjusted the gage by means of a standard micrometer-gage.

It will be obvious that our described device may be utilized as an inside micrometercaliper, as well as a gage for use with planers and milling-machines, and we find by actual practical demonstration that absolutely-correct results may be quickly obtained.

Having thus described our invention, we claim 1. In a micrometer-ga e, the combination with an internally-threaded section having a cupped flanged head serving as a suspensionsupiport, of a screw engaging the threads of sai section with its upper end adapted to be received within the flange with its upper face flush with the under surface of the cup there of when the scale registers zero, said screw having reduced portion with shoulder at its lower end, a barrel portion surrounding said screw and forming therewith a ri id solid structure, the lower end of the barre portion being shouldered to en age the shoulder of the screw and a nut on t e extended reduced end of the screw and clamping the screw and barrel rigidly together, and a binding-collar and plug cooperating therewith for clamping said threaded section and screw together.

2. In a micrometer-ga e, the combination with an internally-threa ed section having a cupped flanged head serving as a suspensionsupport, of a screw engaging the threads of said section with its upper end adapted to be received within the flange with its upper face flush with the under surface of the cup thereof when the scale registers zero, said screw having reduced portion with shoulder at its lower end, a barrel portion surrounding said screw and forming therewith a ri id solid structure, the lower end of the barre portion being shouldered to engage the shoulder of the screw, a nut on the extended reduced end of the screw and clamping the screw and barrel rigidly together, and means loosely mounted on said section, and a plug cooperating therewith for clamping the said section and screw together after they have been adjusted, said means acting by friction.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JAMES C. E. LEAOH. WILLIAM O. WOODMAN. Witnesses:

FRANK H. ALLEN, MAY F. RITCHIE. 

